This is a coin I noticed in a group lot. It is unlisted for the star over the VOT. Ticinum has an issue with a star (it is never over the VOT though) and an issue with a crescent, but no issues with both. The style looks good, so I believe that it is official, perhaps it is only an engravers error or maybe it an unlisted combination of field marks.
Constantine I
Circa A.D. 325
CONSTAN-TINVS AVG; Laureate head only
DN CONSTANTINI MAX AVG laurel wreath enclosing star VOT XX crescent in four lines.
in ex. ST
RIC VII Ticinum –